How are you trying to watch RAV?
Mine has also started freezing up through Rumble, so I have been increasingly watching it on both Roku Channel 194 and also on Pluto ch.470 and I don't remember having issues as of late.
I generally do most of my watching through Rumble for RAV, but usually just switch over to one the above live channels when issues arise.
I have mentioned before that I gave up on the standalone RAV channel/app awhile ago since it became buggy and unstable. (work for awhile, then have issues, then be fixed, then issues again.) At least, that has been been my experience.
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660x, Premiere+ 3921, Express 4k+ 3941